20113131210 has 16 divisors (see below), whose sum is σ = 48271514976. Its totient is φ = 5363501648.

The previous prime is 20113131187. The next prime is 20113131301. The reversal of 20113131210 is 1213131102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20113131210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335218824 + ... + 335218883.

It is an arithmetic number, because the mean of its divisors is an integer number (3016969686).

Almost surely, 2^20113131210 is an apocalyptic number.

20113131210 is an abundant number, since it is smaller than the sum of its proper divisors (28158383766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20113131210 is a wasteful number, since it uses less digits than its factorization.

20113131210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670437717.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20113131210 its reverse (1213131102), we get a palindrome (21326262312).

The spelling of 20113131210 in words is "twenty billion, one hundred thirteen million, one hundred thirty-one thousand, two hundred ten".